基于声发射和交流阻抗谱的钢筋-混凝土粘结性能实验研究
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摘要
钢筋混凝土结构是世界范围内应用最为广泛的结构形式,钢筋和混凝土协同工作的前提是两者间存在良好的粘结性能。综合应用声发射技术和交流阻抗谱技术,研究了不同粉煤灰替代率下钢筋-混凝土的粘结性能。通过引入一种等效电路模型,考察钢筋-混凝土界面电阻和电容的变化来研究损伤发展;再结合声发射实验数据得到不同荷载水平下损伤发展历程。结果表明,适量掺加粉煤灰可强化钢筋-混凝土粘结性能,交流阻抗谱技术和声发射技术可以用来定量研究粘结损伤发展。
Reinforced concrete structures are the most widely used structural forms in the world. The premise of the joint work between steel and concrete is that they have good bonding properties. Through comprehensive application of acoustic emission technology and alternating current impedance spectroscopy technology,the bond performance of rebar-concrete with different fly ash replacement rates was studied. By introducing an equivalent circuit model and investigating the changes of the resistance and capacitance of the steel-concrete interface,the damage development was investigated; the damage history under different load levels was obtained by analyzing the acoustic emission experimental data. The results show that the proper use of fly ash can strength the bond performance of steel-concrete. The alternating current impedance spectroscopy and acoustic emission technology can be used to quantitatively study the development of bond damage.
Reinforced concrete structures are the most widely used structural forms in the world. The premise of the joint work between steel and concrete is that they have good bonding properties. Through comprehensive application of acoustic emission technology and alternating current impedance spectroscopy technology,the bond performance of rebar-concrete with different fly ash replacement rates was studied. By introducing an equivalent circuit model and investigating the changes of the resistance and capacitance of the steel-concrete interface,the damage development was investigated; the damage history under different load levels was obtained by analyzing the acoustic emission experimental data. The results show that the proper use of fly ash can strength the bond performance of steel-concrete. The alternating current impedance spectroscopy and acoustic emission technology can be used to quantitatively study the development of bond damage.
引文
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2 Sanz B,Planas J,Sancho J M.Study of the loss of bond in reinforced concrete specimens with accelerated corrosion by means of push-out tests[J].Construction and Building Materials,2018,160:598-609
3王晨霞,钤建勋,王浩,等.冻融损伤对再生混凝土耐久性及与钢筋粘结性能分析[J].重庆大学学报:自然科学版,2016,39(2):131-139Wang Chenxia,Qian Jianxun,Wang Hao,et al.Analysis the durability and bonding performance of recycled concrete in freezing-thawing[J].Journal of Chongqing University:Natural Science,2016,39(2):131-139
4 Abouhussien A,Hassan A A.Acoustic emission-based analysis of bond behavior of corroded reinforcement in existing concrete structures[J].Structural Control and Health Monitoring,2017,24(3):
5 Ribeiro D V,Abrantes J C C.Application of electrochemical impedance spectroscopy(EIS)to monitor the corrosion of reinforced concrete:A new approach[J].Construction and Building Materials,2016,111(4):98-104
6 Biscaia H,Franco N,Chastre C.Stainless steel bonded to concrete:An experimental assessment using the DIC technique[J].International Journal of Concrete Structures and Materials,2018,12(1):UNSP9
7吴凡,徐亦冬.锈蚀钢筋与混凝土的粘结性能研究综述[J].材料学报,2016,30(2):101-104Wu Fan,Xu Yidong.Review on the bond behavior of concrete with corroded rebar[J].Materials Review,2016,30(2):101-104
8柯晓军,陈宗平,薛建阳,等.反复荷载下型钢混凝土异形柱粘结滑移特性研究[J].工程力学,2013,30(2):211-218Ke Xiaojun,Chen Zongping,Xue Jianyang,et al.Research on bond-slip behavior of steel reinforced concrete special-shaped columns under cyclic loading[J].Engineering Mechanics,2013,30(2):211-218
9 Mo K H,Alengaram U J,Jumaat M Z.Bond properties of lightweight concrete-A review[J].Construction and Building Materials,2016,112:478-496